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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <gtest/gtest.h>
#include <input/LatencyStatistics.h>
#include <cmath>
#include <limits>
#include <thread>
namespace android {
namespace test {
TEST(LatencyStatisticsTest, ResetStats) {
LatencyStatistics stats{5min};
stats.addValue(5.0);
stats.addValue(19.3);
stats.addValue(20);
stats.reset();
ASSERT_EQ(stats.getCount(), 0u);
ASSERT_EQ(std::isnan(stats.getStDev()), true);
ASSERT_EQ(std::isnan(stats.getMean()), true);
}
TEST(LatencyStatisticsTest, AddStatsValue) {
LatencyStatistics stats{5min};
stats.addValue(5.0);
ASSERT_EQ(stats.getMin(), 5.0);
ASSERT_EQ(stats.getMax(), 5.0);
ASSERT_EQ(stats.getCount(), 1u);
ASSERT_EQ(stats.getMean(), 5.0);
ASSERT_EQ(stats.getStDev(), 0.0);
}
TEST(LatencyStatisticsTest, AddMultipleStatsValue) {
LatencyStatistics stats{5min};
stats.addValue(4.0);
stats.addValue(6.0);
stats.addValue(8.0);
stats.addValue(10.0);
float stdev = stats.getStDev();
ASSERT_EQ(stats.getMin(), 4.0);
ASSERT_EQ(stats.getMax(), 10.0);
ASSERT_EQ(stats.getCount(), 4u);
ASSERT_EQ(stats.getMean(), 7.0);
ASSERT_EQ(stdev * stdev, 5.0);
}
TEST(LatencyStatisticsTest, ShouldReportStats) {
LatencyStatistics stats{0min};
stats.addValue(5.0);
std::this_thread::sleep_for(1us);
ASSERT_EQ(stats.shouldReport(), true);
}
} // namespace test
} // namespace android
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